U.S. patent number 4,714,633 [Application Number 07/057,012] was granted by the patent office on 1987-12-22 for expanding and shrinking member.
This patent grant is currently assigned to Nagoya Oilchemical Co., Ltd.. Invention is credited to Seinosuke Horiki, Kuninori Ito, Reiji Makino, Tetsuji Unno.
United States Patent |
4,714,633 |
Horiki , et al. |
December 22, 1987 |
Expanding and shrinking member
Abstract
An expanding and shrinking member useful as a masking member is
provided in the present invention. Said expanding and shrinking
member comprises a panel which consists of a thermoplastic foam
having closed cells and (a) cavity(ies) is(are) formed on one side
of said panel and an adhesive layer is formed on the other side of
said panel.
Inventors: |
Horiki; Seinosuke (Nagoya,
JP), Makino; Reiji (Nagoya, JP), Ito;
Kuninori (Nagoya, JP), Unno; Tetsuji (Aichi,
JP) |
Assignee: |
Nagoya Oilchemical Co., Ltd.
(Tokai, JP)
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Family
ID: |
13832530 |
Appl.
No.: |
07/057,012 |
Filed: |
June 1, 1987 |
Foreign Application Priority Data
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Jun 3, 1986 [JP] |
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61-084506[U] |
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Current U.S.
Class: |
427/282;
428/314.4; 428/12; 428/122; 428/159; 428/317.3; 428/352; 428/354;
428/358; 428/913; 428/41.6 |
Current CPC
Class: |
B05B
12/20 (20180201); Y10T 428/249976 (20150401); Y10T
428/249983 (20150401); Y10T 428/24198 (20150115); Y10T
428/24504 (20150115); Y10T 428/2902 (20150115); Y10T
428/2848 (20150115); Y10S 428/913 (20130101); Y10T
428/2839 (20150115); Y10T 428/1467 (20150115) |
Current International
Class: |
B05B
15/04 (20060101); B05D 001/32 (); B05D 005/00 ();
B32B 007/05 () |
Field of
Search: |
;118/505 ;427/282
;428/40,158,159,160,314.4,314.8,317.3,352,354,913 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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747341 |
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Nov 1966 |
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CA |
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2362584 |
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Jun 1975 |
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DE |
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Primary Examiner: Van Balen; William J.
Attorney, Agent or Firm: Cooper, Dunham, Griffin &
Moran
Claims
We claim:
1. An expanding and shrinking member comprises a panel which
consists of a thermoplastic foam having closed cells and (a)
cavity(ies) is(are) formed on one side of said panel and an
adhesive layer is formed on the other side of said panel.
2. An expanding and shrinking member of claim 1, wherein said
thermoplastic foam is polystyrene foam.
3. An expanding and shrinking member of claim 1, wherein said
adhesive layer is covered with a release sheet.
4. An expanding and shrinking member of claim 1, wherein said panel
is colored by a suitable color.
5. An expanding and shrinking member of claim 1, wherein said
expanding shrinking member is used as a masking member.
6. A method of surface treatment comprising attaching the expanding
and shrinking member of claim 1 to a part of the surface of an
article to be protected from a surface treatment by the adhesive
layer of said member effecting said surface treatment on said
surface of the article, and heating said expanding and shrinking
member to expand and then shrink and separate from said part of
said surface of said article.
7. A method of surface treatment of claim 6, wherein said
thermoplastic foam is polystyrene foam.
8. A method of surface treatment of claim 6, wherein said adhesive
layer is covered with a release sheet.
9. A method of surface treatment of claim 6, wherein said panel is
colored by a suitable color.
Description
BACKGROUND OF THE INVENTION
The present invention relates to an expanding and shrinking member
useful as a masking member. More particularly, the present
invention relates to an expanding and shrinking member comprising a
panel which consists of a thermoplastic foam having closed cells
and cavity(ies) is(are) formed one side of said panel and an
adhesive layer is formed on the other side of said panel.
When a surface treatment such as coating, plating, vacuum
evaporating and the like is effected on the surface of an article,
and if said surface of said article has part(s) on which said
surface treatment should not be effected for the reason that said
surface treatment spoils the appearance of said article and/or
obstructs the firm attachment of parts such as bolts, nuts,
brackets, frames and the like, and so on, said part(s) of said
surface of said article maybe covered and protected with said
masking member.
DESCRIPTION OF THE PRIOR ART
Hitherto, adhesive tape has been used as a masking member to
protect said part(s) of said surface of said article from surface
treatment. Namely, adhesive tape is attached to said part(s) of
said surface of said article to protect it from said surface
treatment and, after said surface treatment, said adhesive tape is
removed from said port(s) of said surface of said article. Said
part(s) may be effected by said surface treatment since said
part(s) was (were) covered with adhesive tape during said surface
treatment.
Said adhesive tape as a masking member has faults. In cases where
the part to be protected form said surface treatment is wide, it is
troublesome to attach adhesive tape to the part(s) to be protected
and remove said adhesive tape from said part(s) since a number of
strips of adhesive tape must be attached to said part(s) to cover
the whole of said part(s), and further, adhesive tape attached to
said part(s) to be protected is buried in the layer of said surface
treatment and it is very difficult to find said buried adhesive
tape and, of course, it is very difficult to remove said buried
adhesive tape.
Still further, it is very difficult to cover only the necessary
parts of a metal structure by adhesive tape resulting in that parts
which are not effected by said surface treatment may remain.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to save trouble
when the masking member(s) is(are) attached/removed to/from part(s)
to be protected.
According to the present invention, there is provided an expanding
and shrinking member useful as a masking member comprising a panel
which consists of a thermoplastic foam having closed cells and (a)
cavity(ies) is(are) formed on one side of said panel and an
adhesive layer is formed on the other side of said panel.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a first embodiment of the present
invention.
FIG. 2 is a side view of the first embodiment of the present
invention.
FIG. 3 is a side sectional view of the first embodiment wherein the
expanding and shrinking member is attached to the surface of an
article.
FIG. 4 is a side sectional view of the first embodiment wherein the
expanding and shrinking member is expanding.
FIG. 5 is a perspective view of the first embodiment wherein the
expanding and shrinking member is expanding.
FIG. 6 is a side sectional view of the first embodiment wherein the
expanding and shrinking member is shrinking.
FIG. 7 is a perspective view of a second embodiment.
FIG. 8 is a perspective view of a third embodiment.
FIG. 9 is a perspective view of a fourth embodiment.
DETAILED DESCRIPTION
FIG. 1 to FIG. 6 relate to the first embodiment of the present
invention.
Referring now to FIG. 1 to FIG. 6, an expanding and shrinking
member (103) comprises a square panel (103A) which consists of a
thermoplastic foam having closed cells and a square cavity (103B)
is formed in the center of one side of said panel (103A) and an
adhesive layer (103C) is formed on the other side of said panel
(103A).
Said thermoplastic foam used as material of said panel (103A) may
be such as a polystyrene foam, a polyethylene foam, a polypropylene
foam, a polyvinylacetate foam and the like and said thermoplastic
foam has closed cells.
Said panel (103A) may be produced by expansion molding, cutting out
said panel from a block of said thermoplastic foam, and the like.
Further said cavity (103B) may be formed simultaneously with said
expansion molding of said panel (103A) or formed by cutting after
said panel is molded or cut out.
Said expanding and shrinking member (103) may be advantageously
provided by covering said adhesive layer (103C) with a release
sheet (103D) such as a polyethylene film, a polypropylene film, a
release paper, and the like to prevent sticking to another article,
the hands of workers and the like when the masking members are
transported, stocked, and handled.
Further, said expanding and shrinking member (103) may be colored
by a suitable color for the purpose of selection the specified
member according to the part to be protected. Further, the colored
member (103) may be easily found when said member (103) is removed
after surface treatment.
When said expanding and shrinking member (103) is used, the release
sheet (103D) may be firstly removed from the adhesive layer (103C)
of said expanding and shrinking member (103) and said member (103)
may be attached to a part (102) of the surface of an article (101)
to be protected from said surface treatment by said adhesive layer
(103C) of said member (103).
After said surface treatment, said expanding and shrinking member
(103) may be heated at a temperature higher than the softening
point of the thermoplastic foam of said member (103) and said
expanding and shrinking member (103) may be softened.
Simultaneously gas contained in the closed cells may expand by the
heating and therefore said member (103) may expand. When said
expanding and shrinking member (103) expands, said member (103) may
bend to the side having a cavity (103B) as shown in FIG. 4 and FIG.
5. Therefore, said member (103) tends to separate from the part
(102) of the article (101). Said expanding and bending member (103)
may break a film 9104) of the surface treatment and further, said
expanding gas may break the walls of the closed cells of the
thermoplastic foam to expand. When said gas expands from the
thermoplastic foam, the member (103) may shrink to separate
naturally from said part (102) of said article (101) as shown in
FIG. 6.
FIG. 7 shows an expanding and shrinking member (203) of the second
embodiment and said expanding and shrinking member (203) comprises
a circular panel (203A) having a circular cavity (203B) in the
center of one side and an adhesive layer (203C) on the other
side.
FIG. 8 shows an expanding and shrinking member (303) of the third
embodiment and said expanding and shrinking member (303) comprises
a square panel (303A) having a square cavity (303B) in a biased
position on one side and an adhesive layer (303C) on the other
side.
FIG. 9 shows an expanding and shrinking member (403) of the fourth
embodiment and said expanding and shrinking member (403) comprises
a square panel (403A) having an L-shaped cavity (403B) on one side
and an adhesive layer (403C) on the other side.
* * * * *